Hunting Washington Forum
Equipment & Gear => Power Equipment & RV => Topic started by: TSLPE on March 22, 2014, 09:12:04 AM
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Just had service done on my chain saw which in approx 29 years old. The fuel mixture according to instructions is 16 to 1. Most of the newer 2 stroke stuff today is 40 or 50 to 1. They tested and tuned my saw with a mix of 40 to 1 saying that the oils of today are far superior than 29 years ago and a 40 to 1 mix is ok for older 2 stroke equipment. What do all you people think? Will it be ok? It won't be getting a lot of use anymore. My firewood cutting days are over. Just be using it for storm clean up and elk camp.
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I would probably keep the oil mix rich just to keep it from over-revving, it was designed to run at 16:1, I would keep it there. I'm sure premium 2 stroke oil is better but that is also a 29 year old 2 stroke engine.
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It would be better to keep the mixture screws adjusted to the rich side, and then use 40:1 mix you should be just fine. Chainsaw will only over-rev if the idle screws are set too lean, and that condition will destroy the engine rapidly.
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Run it at 40-1.
And try to get ethanol free fuel or drain and run the saw dry after every use.
The saw shop is right.
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40:1 is fine for the smaller engines with the better synthetic lubricants out now. 32:1 for the larger engines like motorcycles etc...
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All of my saws are older,most mixes are designed to mix with one gallon of fuel,i stop the pumt at about 9:10-i also add a couple of squirts of stabil to every gallon,ido same for mower and i never have a problem,over time all chainsaws have to be adjusted-even elevation can effect them.
